According to Article 13 of the Regulations for the Implementation of the Law of the People's Republic of China on Road Traffic Safety, motor vehicle number plates shall be hung at designated positions in front of and behind the vehicle to keep them clear and complete. Heavy and medium-sized trucks and their trailers, tractors and their trailers shall be painted with enlarged brand numbers at the rear of the carriage, and the words shall be correct and clear.

Motor vehicle inspection signs and insurance signs shall be affixed to the upper right corner of the front window of the motor vehicle. Motor vehicle spraying, labeling or body advertising shall not affect safe driving.

Extended data:

"Road Traffic Safety Law of the People's Republic of China" Article 11 When a motor vehicle runs on the road, it shall hang the motor vehicle number plate, place the inspection mark and insurance mark, and carry the motor vehicle driving license with it. Motor vehicle number plates shall be hung in accordance with the regulations and kept clear and complete, and shall not be intentionally obscured or defiled. No unit or individual may confiscate or detain the motor vehicle license plate.

Sixteenth any unit or individual shall have the following acts:

1, assembling motor vehicles or changing the registered structure, structure or characteristics of motor vehicles without authorization;

2, change the motor vehicle model, engine number, frame number or vehicle identification code;

3. Forge, alter or use forged or altered motor vehicle registration certificates, number plates, driving licenses, inspection marks and insurance marks;

4. Use the registration certificate, license plate, driving license, inspection mark and insurance mark of other motor vehicles.

Baidu Encyclopedia-Regulations for the Implementation of the Road Traffic Safety Law of the People's Republic of China